Tobacco pipe



E. KRATOCHVIL March 27, 1928.

TOBACCO PIPE Filed Oct. 22. 1926 Em an uel 1f ralac/z Vil INVENTOR ATTOR N EY Patented Mar. 27, 1928.

UNITED STATES EMANUEL KRA'IOCHVIL, OF CHICAGO, ILLINOIS.

TOBACCO PIPE.

Application filed October 22, 1926. Serial No. 143,451.

This invention relates to a tobacco pipe. Its object is to provide a smoker with a cool smoke. In carrying out the invent on I provide a draft opening through the stem and -leading to'a passage outside the bowl, preferabl in a circuitous path around the same, WhlCh path terminates in an opening to the bowl, whereby the smoke from the burning tobacco passes through the path around the bowl and is cooled \thereby and then leads to the draft opening in the stem to the mouth of the smoker. In carrying out the invention I provide this circuitous path in a detachable circular mantle of molded material in which is formed a long path, one end of which communicates with the axis of the bowl containing the tobacco and the other end communicates with a well in the stem, and thence through the stem to the mouth of the smoker. The mantle rests loosely on the .bowl, thereby affording a thin air space between the body of the bowl and .the inside wall of the mantle, and is perforated in a plurality of transverse holes for free access of air; thus the bowl with the burning tobacco does not communicate its heat to the mantle except through an air space which maintains the smoke at a comparatively low temperature before it reaches the mouth.

My invention, therefore, in its broader scope consists of a pipe having the induction draft opening in the stem leading through a cool path around the bowl and thence to the axial opening in the bowl. It comprises also other and more specific features, the novelty of which will hereinafter be described and definitely indicated in the appended claims.

In the accompanying drawings: Fi ure 1 is a part sectional elevation showing the construction of my pipe.

Figure 2 is a similar view on a slightly displaced plane.

Figure 3 is a section on the plane 3-3 of Figure 1. V

Figure 4 is a vertical sectionthrough the stem on a plane cutting the smoke passage.

Referring now in detail to the drawings, 1 represents a pipe with a usual stem formed of rubber, bakelite, or similar material, which is detachable from the bowl 2 and carries a cylindrical perforated plug 3 which passes friction-tight into a cylindrical cavity or well 4 in the wall adjacent the bowl. The bowl itself with the lateral stem section is made of any suitable material, but I prefer to make it of briar, and as the parts are of small section, smaller than is commonly used for a complete briar pipe, and is frequently a waste material, it is therefore comparatively inexpensive. However, the bowl may be made of more expensive material as meerschaum or porous clay. In the well is a rectangular aluminum tube passing through the stem and base of the bowl, as indicated 4, which registers with a duct 5 in a mantle 6 lying loosely over a reduced section 7 of the bowl. This mantle I preferably make of a compound formed of 40% bakelite and wood flour which is a sufliciently heat refractory material for the purpose and is easily molded. In the molding operation the mantle is given a size to drop loosely over the reduced portion of the stem, leaving an air film indicated at 8 between the wooden bowl and the inner wall of the molded compound. The mantle in the molding operation is formed with a serpentine hollow duct 5, the terminals of which lie closely adjacent, one communicating with a short pro ecting section of the tube 4 and the other communicating with the bottom of the pipe bowl. Transversely in the mantle are a plurality of openings 9 which are preferably formed in two rows at the top and bottom, thus permitting the entrance of outside cool air into the air space between the inner wall of the mantle and the outer wall of the bowl and serving to radiate heat and maintain the "outside of the bowl at a relatively moderate temperature. A cap 10 with a screw thread to cooperate with the upper edge of the bowl clamps down on the mantle and keeps it in snug position, Beneath the mantle is a fibrous washer of paper or porous fabric 11 which makes a good seal, this washer being perforated in adjacent positions corresponding to the eduction side 4' of the smoke and the induction side or port 12 communicating with the bottom of the bowl and into which the smoke is drawn and is thence carried through the serpentine passage, reduced in temperature, and carried through the well to the mouth. It will be apparent from what has hereinbefore been stated that subjection of the smoke to the temperature of the mantle-which is at all times exposed to the outer atmosphereds very much reduced from the temperature in the bow1-and as the mantle is separated from the bowl by a wall of air in open access through the holes 9, the outer wall of the bowl is kept relatively cool so that thesmoker will be afforded a clean, dry,

cool smoke. The small number of parts and the separable mantle render the pipe easily cleaned.

I have thus described my invention in the best form I have hitherto provided, in accordance with the statutes, but minor modifications may be made in the parts without departing from the scope of my appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: v

1. A tobacco pipe having the stem and bowl, a mantle outside the bowl, said mantle having an extended passage leading to the bowl and stem at its respective ends and surrounding the bowl with an intervening an' space. a

2. A tobacco pipe having a bowl, a removable mantle around the same, having a tortuous smoke 'ath one end of which communicates wit the bowl and the other with the stem, and a stem leading from the bowl.

3. A tobacco pipe having a bowl, a removable perforated mantle around the same having a tortuous smoke path, one end of which communicates with the bowl, an angular passage communicating with the other end of the tortuous path at the stem end, having an enlarged well communicating with the tortuous path.

In testimony whereof I aifix my signature.

EMANUEL KRATOCHVIL. 

